package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.commonutils.R;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exception.GlobalExceptionHandler;
import com.atguigu.servicebase.exception.MyException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import java.util.Map;

/**
 * @Author: shaki
 * @Date: 2021/5/30 15:51
 * 该类不能交给spring进行管理，需要自己new，不能注入其他对象
 * 不能实现数据库操作
 */
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    public EduSubjectService eduSubjectService;
    public SubjectExcelListener(EduSubjectService eduSubjectService) {
        this.eduSubjectService = eduSubjectService;
    }
    public SubjectExcelListener() {
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData == null){
            throw new MyException(20001,"文件数据为空");
        }
        EduSubject existOneSubject = this.existOneSubject(eduSubjectService, subjectData.getOneSubjectName());
        if(existOneSubject == null){//没有相同的一级分类
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            eduSubjectService.save(existOneSubject);
        }
        //添加二级分类
        String pid = existOneSubject.getId(); //获取一级分类的id值
        EduSubject existTwoSubject = this.existTwoSubject(eduSubjectService, subjectData.getTwoSubjectName(), pid);
        if(existTwoSubject == null){//没有相同的一级分类
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            eduSubjectService.save(existTwoSubject);
        }
    }
    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService, String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id",0);
        EduSubject subject = subjectService.getOne(wrapper);
        return subject;
    }
    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService, String name, String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id",pid);
        EduSubject subject = subjectService.getOne(wrapper);
        return subject;
    }

    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        super.invokeHeadMap(headMap, context);
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
